Chemistry

Question 0

Mass

Answer 0

The quantity of matter an object has. Like the volume of mass of an object

Question 1

Matter

Answer 1

Anything made of atoms and molecules - anything that has mass (all of the stuff in our universe)

Question 2

Weight

Answer 2

The pull of gravity

Question 3

Compound

Answer 3

A substance containing two or more elements

Question 4

Element

Answer 4

Pure substance that cannot be broken down into other substance

Question 5

Atoms

Answer 5

Building blocks of matter
Proton- positive charge (+)
Electron- negative charge (-)
Neutron- no charge

Question 6

Protons

Answer 6

Packed with neutrons in nucleus

Make up most of the atoms mass

Question 7

Electrons

Answer 7

Negative charge
Opposites attract (with protons)

Question 8

Ionization

Answer 8

The amount of energy required to make an electron leave it’s atom

Question 9

Isotopes

Answer 9

At atom with the same number of protons but a different number of neutrons

Question 10

Valance electrons

Answer 10

An electron in the outer most shell of an atom

Question 11

Octet rule

Answer 11

Every atoms outer shell must be full
8 valance electrons is a full outer shell
An atom is happy with a full outer shell or a neutral charge

Question 12

Bohr diagram

Answer 12

The one with the circle and the dots around it’s shells

Question 13

Lewis structure

Answer 13

The one where you draw the dots around the atoms symbol (letter)

Question 14

Covalent bond

Answer 14

When atoms share electrons

Question 15

Ionic bond

Answer 15

When an atom gives an el

Question 16

Van der Waal force

Answer 16

Proximity bond or when two atoms stick together without bonding electrons

Question 17

Cation

Answer 17

A positive ion

Question 18

Anion

Answer 18

Negative ion

Question 19

Rules for writing molecular formulas

Answer 19

Cations go first
No big numbers in middle
Charge=superscript
Quantity of ions is written as subscript

Question 20

Balancing equations

Answer 20

Reactions on left and products on right

Question 21

Atomic number

Answer 21

Protons + electrons

All atoms with same atomic number will behave the same

Question 22

Atomic number

Answer 22

Protons + electrons

All atoms with same atomic number will behave the same

Question 23

Neutron

Answer 23

To find the amount of neutrons you do this:
Atomic mass - protons
No charge

Question 24

Carbon 12, 13 and 14

Answer 24

Carbon 12 - 6 protons and 6 neutrons Carbon 13 - isotope because neutrons change - 6 protons but 7 neutrons 6 + 7 = 13 (carbon 13) Carbon 14 - also an isotope - 6 protons + 8 neutrons

Question 25

Radioactive Isotopes

Answer 25

- Can track it - medical purposes - carbon dating - Carbon 12, 13 and 14 are radioactive

Question 26

Chemical Formulas

Answer 26

Make sure to remember parentheses in between different molecules ---> Cl(Na)

Question 27

Robert Boyle

Answer 27

An amateur chemist who first labeled substances as either acids or bases

Question 28

Alkalies

Answer 28

A word used to classify bases

Question 29

Acid

Answer 29

A compound that releases hydrogen ions

Question 30

Dissolve

Answer 30

Separating them into individual ions

Question 31

What happens to acids when they are placed in water?

Answer 31

It dissolves and releases a hydrogen ion.

Question 32

Why happens to bases when they are place into water?

Answer 32

They dissolve and release hydroxide ions

Question 33

What happens when you mix an acid and a base together?

Answer 33

They make water because the H+ ions from the acid combines with the H- ions from the bases

Question 34

Johannes Brønsted

Answer 34

Danish scientist | Somehow had to do with the armenhuis theory

Question 35

How is the acidity or basicity of something measured?

Answer 35

pH scale

Question 36

Buffer

Answer 36

A mixture of a weak acid an it's conjugate base or weak base and it's conjugate acid

Question 37

How does an acid become a conjugate base?

Answer 37

When it lose a hydrogen ion

Question 38

How does buffers have the ability to moderate pH?

Answer 38

The replacements of string acids and bases for weaker ones

Question 39

Where are bases found on the pH scale?

Answer 39

8-14

Question 40

Where are acids found on the pH scale?

Answer 40

0-6

Question 41

What Is neutral on the pH scale and what substance is neutral?

Answer 41

.